Richard vose



R. vosnn' GAR SPRING.

No. 28,619 Patented June .5, 1860.

245512655 65 jweuim"! UNITED STATES PATENT oEEIoE.

RICHARD VOSE, OF NEW YORK, N. Y.

CAR-SPRING. I

Specification forming part of Letters Patent No. 28,619, dated June 5,1860; Reissued August 6,

To all whom it may concern:

Be it known that I, RICHARD VosE, of the city, county, and State of NewYork, have invented a new and Improved Car-Spring; and I do herebydeclare that the following is a full and exact description thereof,reference being had to the accompanying drawings, which form a part ofthis specification.

Figure l, is a side view of my improved car-spring; Fig. 2, alongitudinal section; and Fig. 8, an end view of the same.

My improved car-spring is composed of centrally perforated flat-sideddisks (Z, (Z, (Z, of vulcanized india rubber, or gutta percha, combinedwith each other by means of the caps a, b, the rings 0, 0, and thecentral bear ings e, 6, represented in the drawings.

It will be perceived that the inelastic portions (2 Z), 0, e, of myimproved car spring are of such a shape that, when no pressure isexerted upon the spring, only the angles at the outer and innerperipheries of the disks (Z, (Z, are in contact with the said inelasticportions of the car-spring; and that when pressure is exerted upon thespring, its elastic disks (Z, (Z, are permitted to yield freely at theirouter and inner peripheries, while their flat sides are received intoflaring air cavities; which arrangement causes the pressure to beexerted upon the said elastic disks, through the medium of the air whichis confined within the flaring cavities above and below the same;thereby giving to 'my said car-spring the advantages of the elasticproperties of air and india rubber acting jointly the one upon theother.

The peculiar shape of the inelastic portions a, b, c, e, of my improvedcar-spring, by which flaring cavities are formed above and below theelastic disks (Z, (Z, at the same time that air spaces are left withinthe inner peripheries of said disks, is clearly shown in Fig. 2, of thedrawings :to wit: Each of the caps a, and b, has a flaring annulargroove formed Within its inner face which outwardly terminates in a lipor flange that incloses the elastic disk (Z, at that end of the carspring. The cross-section of each ring 0, has the form of an outwardlythickening wedge whose sides outwardly terminate in verticallyprojecting lips or flanges which correspond in shape and diameter withthe above mentioned flanges at the outer periphery of the grooves in theinner faces of the caps a, and Z). The form of each central bearing 6,is that of a short tube or thimble, which has a tapering flangeradiating from the central portion of its outer periphery; the saidflange corresponding in shape with that of the tapering and inwardlyprojecting portion of each ring 0, which is placed immediately oppositeto the said flange. The bearing surfaces which are placed opposite tothe flat faces of each of the elastic disks (Z, (Z, being of a concaveshape, at the same time that the outer and inner peripheries of saiddisks are left unconfined, save at their angles, the compressing actionexerted upon the said elastic disks (Z, (Z, while it will prevent anybursting expansion of the outer periphery of the flat faces of each ofthe elastic disks, will also distribute the compressing force moreuniformly throughout the bodies of the said disks than has ever beforebeen accomplished by any other arrangement of india rubber disks withinelastic bearings. The result of which new arrangement is a moreuniformly elastic and a more durable car-spring than has ever beforebeen produced.

What I claim as my invention and desire to secure by Letters Patent, is

The disks (Z, (Z, (Z, the caps a, b, the rings 0, c, and the centralbearings c, a, when 0011- structed and arranged substantially in themanner herein set forth.

RICHARD VOSE.

Witnesses:

Z. O. ROBBINS, GRENVILLE LEWIS.

